期刊
CELLULOSE
卷 20, 期 2, 页码 597-603出版社
SPRINGER
DOI: 10.1007/s10570-013-9866-x
关键词
Cellulose microfibrils; Glaucocystis; Low frequency sonication; Allomorphic transition
资金
- Region Rhone-Alpes
- Grants-in-Aid for Scientific Research [23688020] Funding Source: KAKEN
Aqueous suspensions of dispersed Glaucocystis cellulose microfibrils were sonicated at 4 A degrees C for 3 h, using 24 kHz ultrasonic waves. This treatment induced a variety of ultrastructural defects, as the microfibrils became not only shortened, but also presented substantial damage materialized by kinks and subfibrillation. Upon analysis by X-ray diffraction and C-13 solid-state NMR spectroscopy, it was found that the initial sample that contained 90 % of cellulose I-alpha allomorph became, to a large extent, unexpectedly converted into the I-beta phase, while the loss of crystallinity was only moderate during the sonication treatment.
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